Finding the Third Proportional to 323,419.50 and 680,352

Step by Step Solution

1. Step 1: Write the proportion equation
   323,419.50 : 680,352 = 680,352 : x
2. Step 2: Convert to fraction form
   323,419.50/680,352 = 680,352/x
3. Step 3: Cross multiply
   323,419.50x = 680,352 × 680,352
4. Step 4: Simplify right side
   323,419.50x = 462,878,843,904
5. Step 5: Solve for x
   x = 462,878,843,904/323,419.50
6. Step 6: Final answer
   x = 1,431,202.65